Commit | Line | Data |
---|---|---|
f8a95309 ACM |
1 | /* |
2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> | |
3 | * | |
4 | * Parts came from builtin-{top,stat,record}.c, see those files for further | |
5 | * copyright notes. | |
6 | * | |
7 | * Released under the GPL v2. (and only v2, not any later version) | |
8 | */ | |
a8c9ae18 | 9 | #include "util.h" |
956fa571 | 10 | #include <api/fs/fs.h> |
5c581041 | 11 | #include <poll.h> |
f8a95309 ACM |
12 | #include "cpumap.h" |
13 | #include "thread_map.h" | |
12864b31 | 14 | #include "target.h" |
361c99a6 ACM |
15 | #include "evlist.h" |
16 | #include "evsel.h" | |
e3e1a54f | 17 | #include "debug.h" |
35b9d88e | 18 | #include <unistd.h> |
361c99a6 | 19 | |
50d08e47 | 20 | #include "parse-events.h" |
4b6ab94e | 21 | #include <subcmd/parse-options.h> |
50d08e47 | 22 | |
f8a95309 ACM |
23 | #include <sys/mman.h> |
24 | ||
70db7533 ACM |
25 | #include <linux/bitops.h> |
26 | #include <linux/hash.h> | |
0389cd1f | 27 | #include <linux/log2.h> |
8dd2a131 | 28 | #include <linux/err.h> |
70db7533 | 29 | |
8db6d6b1 | 30 | static void perf_mmap__munmap(struct perf_mmap *map); |
4876075b | 31 | static void perf_mmap__put(struct perf_mmap *map); |
e4b356b5 | 32 | |
f8a95309 | 33 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
a91e5431 | 34 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
f8a95309 | 35 | |
7e2ed097 ACM |
36 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
37 | struct thread_map *threads) | |
ef1d1af2 ACM |
38 | { |
39 | int i; | |
40 | ||
41 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) | |
42 | INIT_HLIST_HEAD(&evlist->heads[i]); | |
43 | INIT_LIST_HEAD(&evlist->entries); | |
7e2ed097 | 44 | perf_evlist__set_maps(evlist, cpus, threads); |
1b85337d | 45 | fdarray__init(&evlist->pollfd, 64); |
35b9d88e | 46 | evlist->workload.pid = -1; |
3a62a7b8 | 47 | evlist->backward = false; |
ef1d1af2 ACM |
48 | } |
49 | ||
334fe7a3 | 50 | struct perf_evlist *perf_evlist__new(void) |
361c99a6 ACM |
51 | { |
52 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); | |
53 | ||
ef1d1af2 | 54 | if (evlist != NULL) |
334fe7a3 | 55 | perf_evlist__init(evlist, NULL, NULL); |
361c99a6 ACM |
56 | |
57 | return evlist; | |
58 | } | |
59 | ||
b22d54b0 JO |
60 | struct perf_evlist *perf_evlist__new_default(void) |
61 | { | |
62 | struct perf_evlist *evlist = perf_evlist__new(); | |
63 | ||
64 | if (evlist && perf_evlist__add_default(evlist)) { | |
65 | perf_evlist__delete(evlist); | |
66 | evlist = NULL; | |
67 | } | |
68 | ||
69 | return evlist; | |
70 | } | |
71 | ||
5bae0250 ACM |
72 | struct perf_evlist *perf_evlist__new_dummy(void) |
73 | { | |
74 | struct perf_evlist *evlist = perf_evlist__new(); | |
75 | ||
76 | if (evlist && perf_evlist__add_dummy(evlist)) { | |
77 | perf_evlist__delete(evlist); | |
78 | evlist = NULL; | |
79 | } | |
80 | ||
81 | return evlist; | |
82 | } | |
83 | ||
75562573 AH |
84 | /** |
85 | * perf_evlist__set_id_pos - set the positions of event ids. | |
86 | * @evlist: selected event list | |
87 | * | |
88 | * Events with compatible sample types all have the same id_pos | |
89 | * and is_pos. For convenience, put a copy on evlist. | |
90 | */ | |
91 | void perf_evlist__set_id_pos(struct perf_evlist *evlist) | |
92 | { | |
93 | struct perf_evsel *first = perf_evlist__first(evlist); | |
94 | ||
95 | evlist->id_pos = first->id_pos; | |
96 | evlist->is_pos = first->is_pos; | |
97 | } | |
98 | ||
733cd2fe AH |
99 | static void perf_evlist__update_id_pos(struct perf_evlist *evlist) |
100 | { | |
101 | struct perf_evsel *evsel; | |
102 | ||
e5cadb93 | 103 | evlist__for_each_entry(evlist, evsel) |
733cd2fe AH |
104 | perf_evsel__calc_id_pos(evsel); |
105 | ||
106 | perf_evlist__set_id_pos(evlist); | |
107 | } | |
108 | ||
361c99a6 ACM |
109 | static void perf_evlist__purge(struct perf_evlist *evlist) |
110 | { | |
111 | struct perf_evsel *pos, *n; | |
112 | ||
e5cadb93 | 113 | evlist__for_each_entry_safe(evlist, n, pos) { |
361c99a6 | 114 | list_del_init(&pos->node); |
d49e4695 | 115 | pos->evlist = NULL; |
361c99a6 ACM |
116 | perf_evsel__delete(pos); |
117 | } | |
118 | ||
119 | evlist->nr_entries = 0; | |
120 | } | |
121 | ||
ef1d1af2 | 122 | void perf_evlist__exit(struct perf_evlist *evlist) |
361c99a6 | 123 | { |
04662523 | 124 | zfree(&evlist->mmap); |
b2cb615d | 125 | zfree(&evlist->backward_mmap); |
1b85337d | 126 | fdarray__exit(&evlist->pollfd); |
ef1d1af2 ACM |
127 | } |
128 | ||
129 | void perf_evlist__delete(struct perf_evlist *evlist) | |
130 | { | |
0b04b3dc ACM |
131 | if (evlist == NULL) |
132 | return; | |
133 | ||
983874d1 | 134 | perf_evlist__munmap(evlist); |
f26e1c7c | 135 | perf_evlist__close(evlist); |
f30a79b0 | 136 | cpu_map__put(evlist->cpus); |
186fbb74 | 137 | thread_map__put(evlist->threads); |
03ad9747 ACM |
138 | evlist->cpus = NULL; |
139 | evlist->threads = NULL; | |
ef1d1af2 ACM |
140 | perf_evlist__purge(evlist); |
141 | perf_evlist__exit(evlist); | |
361c99a6 ACM |
142 | free(evlist); |
143 | } | |
144 | ||
adc0c3e8 AH |
145 | static void __perf_evlist__propagate_maps(struct perf_evlist *evlist, |
146 | struct perf_evsel *evsel) | |
147 | { | |
148 | /* | |
149 | * We already have cpus for evsel (via PMU sysfs) so | |
150 | * keep it, if there's no target cpu list defined. | |
151 | */ | |
152 | if (!evsel->own_cpus || evlist->has_user_cpus) { | |
153 | cpu_map__put(evsel->cpus); | |
154 | evsel->cpus = cpu_map__get(evlist->cpus); | |
155 | } else if (evsel->cpus != evsel->own_cpus) { | |
156 | cpu_map__put(evsel->cpus); | |
157 | evsel->cpus = cpu_map__get(evsel->own_cpus); | |
158 | } | |
159 | ||
160 | thread_map__put(evsel->threads); | |
161 | evsel->threads = thread_map__get(evlist->threads); | |
162 | } | |
163 | ||
164 | static void perf_evlist__propagate_maps(struct perf_evlist *evlist) | |
165 | { | |
166 | struct perf_evsel *evsel; | |
167 | ||
e5cadb93 | 168 | evlist__for_each_entry(evlist, evsel) |
adc0c3e8 AH |
169 | __perf_evlist__propagate_maps(evlist, evsel); |
170 | } | |
171 | ||
361c99a6 ACM |
172 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
173 | { | |
d49e4695 | 174 | entry->evlist = evlist; |
361c99a6 | 175 | list_add_tail(&entry->node, &evlist->entries); |
ef503831 | 176 | entry->idx = evlist->nr_entries; |
60b0896c | 177 | entry->tracking = !entry->idx; |
ef503831 | 178 | |
75562573 AH |
179 | if (!evlist->nr_entries++) |
180 | perf_evlist__set_id_pos(evlist); | |
44c42d71 AH |
181 | |
182 | __perf_evlist__propagate_maps(evlist, entry); | |
361c99a6 ACM |
183 | } |
184 | ||
4768230a AH |
185 | void perf_evlist__remove(struct perf_evlist *evlist, struct perf_evsel *evsel) |
186 | { | |
187 | evsel->evlist = NULL; | |
188 | list_del_init(&evsel->node); | |
189 | evlist->nr_entries -= 1; | |
190 | } | |
191 | ||
0529bc1f | 192 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
f114d6ef | 193 | struct list_head *list) |
50d08e47 | 194 | { |
f114d6ef | 195 | struct perf_evsel *evsel, *temp; |
75562573 | 196 | |
e5cadb93 | 197 | __evlist__for_each_entry_safe(list, temp, evsel) { |
f114d6ef AH |
198 | list_del_init(&evsel->node); |
199 | perf_evlist__add(evlist, evsel); | |
200 | } | |
50d08e47 ACM |
201 | } |
202 | ||
63dab225 ACM |
203 | void __perf_evlist__set_leader(struct list_head *list) |
204 | { | |
205 | struct perf_evsel *evsel, *leader; | |
206 | ||
207 | leader = list_entry(list->next, struct perf_evsel, node); | |
97f63e4a NK |
208 | evsel = list_entry(list->prev, struct perf_evsel, node); |
209 | ||
210 | leader->nr_members = evsel->idx - leader->idx + 1; | |
63dab225 | 211 | |
e5cadb93 | 212 | __evlist__for_each_entry(list, evsel) { |
74b2133d | 213 | evsel->leader = leader; |
63dab225 ACM |
214 | } |
215 | } | |
216 | ||
217 | void perf_evlist__set_leader(struct perf_evlist *evlist) | |
6a4bb04c | 218 | { |
97f63e4a NK |
219 | if (evlist->nr_entries) { |
220 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; | |
63dab225 | 221 | __perf_evlist__set_leader(&evlist->entries); |
97f63e4a | 222 | } |
6a4bb04c JO |
223 | } |
224 | ||
45cf6c33 | 225 | void perf_event_attr__set_max_precise_ip(struct perf_event_attr *attr) |
7f8d1ade ACM |
226 | { |
227 | attr->precise_ip = 3; | |
228 | ||
229 | while (attr->precise_ip != 0) { | |
230 | int fd = sys_perf_event_open(attr, 0, -1, -1, 0); | |
231 | if (fd != -1) { | |
232 | close(fd); | |
233 | break; | |
234 | } | |
235 | --attr->precise_ip; | |
236 | } | |
237 | } | |
238 | ||
361c99a6 ACM |
239 | int perf_evlist__add_default(struct perf_evlist *evlist) |
240 | { | |
241 | struct perf_event_attr attr = { | |
242 | .type = PERF_TYPE_HARDWARE, | |
243 | .config = PERF_COUNT_HW_CPU_CYCLES, | |
244 | }; | |
1aed2671 JR |
245 | struct perf_evsel *evsel; |
246 | ||
247 | event_attr_init(&attr); | |
361c99a6 | 248 | |
7f8d1ade ACM |
249 | perf_event_attr__set_max_precise_ip(&attr); |
250 | ||
ef503831 | 251 | evsel = perf_evsel__new(&attr); |
361c99a6 | 252 | if (evsel == NULL) |
cc2d86b0 SE |
253 | goto error; |
254 | ||
7f8d1ade ACM |
255 | /* use asprintf() because free(evsel) assumes name is allocated */ |
256 | if (asprintf(&evsel->name, "cycles%.*s", | |
257 | attr.precise_ip ? attr.precise_ip + 1 : 0, ":ppp") < 0) | |
cc2d86b0 | 258 | goto error_free; |
361c99a6 ACM |
259 | |
260 | perf_evlist__add(evlist, evsel); | |
261 | return 0; | |
cc2d86b0 SE |
262 | error_free: |
263 | perf_evsel__delete(evsel); | |
264 | error: | |
265 | return -ENOMEM; | |
361c99a6 | 266 | } |
5c581041 | 267 | |
5bae0250 ACM |
268 | int perf_evlist__add_dummy(struct perf_evlist *evlist) |
269 | { | |
270 | struct perf_event_attr attr = { | |
271 | .type = PERF_TYPE_SOFTWARE, | |
272 | .config = PERF_COUNT_SW_DUMMY, | |
273 | .size = sizeof(attr), /* to capture ABI version */ | |
274 | }; | |
275 | struct perf_evsel *evsel = perf_evsel__new(&attr); | |
276 | ||
277 | if (evsel == NULL) | |
278 | return -ENOMEM; | |
279 | ||
280 | perf_evlist__add(evlist, evsel); | |
281 | return 0; | |
282 | } | |
283 | ||
e60fc847 ACM |
284 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
285 | struct perf_event_attr *attrs, size_t nr_attrs) | |
50d08e47 ACM |
286 | { |
287 | struct perf_evsel *evsel, *n; | |
288 | LIST_HEAD(head); | |
289 | size_t i; | |
290 | ||
291 | for (i = 0; i < nr_attrs; i++) { | |
ef503831 | 292 | evsel = perf_evsel__new_idx(attrs + i, evlist->nr_entries + i); |
50d08e47 ACM |
293 | if (evsel == NULL) |
294 | goto out_delete_partial_list; | |
295 | list_add_tail(&evsel->node, &head); | |
296 | } | |
297 | ||
f114d6ef | 298 | perf_evlist__splice_list_tail(evlist, &head); |
50d08e47 ACM |
299 | |
300 | return 0; | |
301 | ||
302 | out_delete_partial_list: | |
e5cadb93 | 303 | __evlist__for_each_entry_safe(&head, n, evsel) |
50d08e47 ACM |
304 | perf_evsel__delete(evsel); |
305 | return -1; | |
306 | } | |
307 | ||
79695e1b ACM |
308 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
309 | struct perf_event_attr *attrs, size_t nr_attrs) | |
310 | { | |
311 | size_t i; | |
312 | ||
313 | for (i = 0; i < nr_attrs; i++) | |
314 | event_attr_init(attrs + i); | |
315 | ||
316 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); | |
317 | } | |
318 | ||
da378962 ACM |
319 | struct perf_evsel * |
320 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) | |
ee29be62 ACM |
321 | { |
322 | struct perf_evsel *evsel; | |
323 | ||
e5cadb93 | 324 | evlist__for_each_entry(evlist, evsel) { |
ee29be62 ACM |
325 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
326 | (int)evsel->attr.config == id) | |
327 | return evsel; | |
328 | } | |
329 | ||
330 | return NULL; | |
331 | } | |
332 | ||
a2f2804a DA |
333 | struct perf_evsel * |
334 | perf_evlist__find_tracepoint_by_name(struct perf_evlist *evlist, | |
335 | const char *name) | |
336 | { | |
337 | struct perf_evsel *evsel; | |
338 | ||
e5cadb93 | 339 | evlist__for_each_entry(evlist, evsel) { |
a2f2804a DA |
340 | if ((evsel->attr.type == PERF_TYPE_TRACEPOINT) && |
341 | (strcmp(evsel->name, name) == 0)) | |
342 | return evsel; | |
343 | } | |
344 | ||
345 | return NULL; | |
346 | } | |
347 | ||
39876e7d ACM |
348 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
349 | const char *sys, const char *name, void *handler) | |
350 | { | |
ef503831 | 351 | struct perf_evsel *evsel = perf_evsel__newtp(sys, name); |
39876e7d | 352 | |
8dd2a131 | 353 | if (IS_ERR(evsel)) |
39876e7d ACM |
354 | return -1; |
355 | ||
744a9719 | 356 | evsel->handler = handler; |
39876e7d ACM |
357 | perf_evlist__add(evlist, evsel); |
358 | return 0; | |
359 | } | |
360 | ||
bf8e8f4b AH |
361 | static int perf_evlist__nr_threads(struct perf_evlist *evlist, |
362 | struct perf_evsel *evsel) | |
363 | { | |
364 | if (evsel->system_wide) | |
365 | return 1; | |
366 | else | |
367 | return thread_map__nr(evlist->threads); | |
368 | } | |
369 | ||
4152ab37 ACM |
370 | void perf_evlist__disable(struct perf_evlist *evlist) |
371 | { | |
4152ab37 | 372 | struct perf_evsel *pos; |
3e27c920 | 373 | |
e5cadb93 | 374 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
375 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
376 | continue; | |
377 | perf_evsel__disable(pos); | |
4152ab37 | 378 | } |
2b56bcfb ACM |
379 | |
380 | evlist->enabled = false; | |
4152ab37 ACM |
381 | } |
382 | ||
764e16a3 DA |
383 | void perf_evlist__enable(struct perf_evlist *evlist) |
384 | { | |
764e16a3 | 385 | struct perf_evsel *pos; |
3e27c920 | 386 | |
e5cadb93 | 387 | evlist__for_each_entry(evlist, pos) { |
3e27c920 JO |
388 | if (!perf_evsel__is_group_leader(pos) || !pos->fd) |
389 | continue; | |
390 | perf_evsel__enable(pos); | |
764e16a3 | 391 | } |
2b56bcfb ACM |
392 | |
393 | evlist->enabled = true; | |
394 | } | |
395 | ||
396 | void perf_evlist__toggle_enable(struct perf_evlist *evlist) | |
397 | { | |
398 | (evlist->enabled ? perf_evlist__disable : perf_evlist__enable)(evlist); | |
764e16a3 DA |
399 | } |
400 | ||
1c65056c AH |
401 | static int perf_evlist__enable_event_cpu(struct perf_evlist *evlist, |
402 | struct perf_evsel *evsel, int cpu) | |
403 | { | |
404 | int thread, err; | |
405 | int nr_threads = perf_evlist__nr_threads(evlist, evsel); | |
406 | ||
407 | if (!evsel->fd) | |
408 | return -EINVAL; | |
409 | ||
410 | for (thread = 0; thread < nr_threads; thread++) { | |
411 | err = ioctl(FD(evsel, cpu, thread), | |
412 | PERF_EVENT_IOC_ENABLE, 0); | |
413 | if (err) | |
414 | return err; | |
415 | } | |
416 | return 0; | |
417 | } | |
418 | ||
419 | static int perf_evlist__enable_event_thread(struct perf_evlist *evlist, | |
420 | struct perf_evsel *evsel, | |
421 | int thread) | |
422 | { | |
423 | int cpu, err; | |
424 | int nr_cpus = cpu_map__nr(evlist->cpus); | |
425 | ||
426 | if (!evsel->fd) | |
427 | return -EINVAL; | |
428 | ||
429 | for (cpu = 0; cpu < nr_cpus; cpu++) { | |
430 | err = ioctl(FD(evsel, cpu, thread), PERF_EVENT_IOC_ENABLE, 0); | |
431 | if (err) | |
432 | return err; | |
433 | } | |
434 | return 0; | |
435 | } | |
436 | ||
437 | int perf_evlist__enable_event_idx(struct perf_evlist *evlist, | |
438 | struct perf_evsel *evsel, int idx) | |
439 | { | |
440 | bool per_cpu_mmaps = !cpu_map__empty(evlist->cpus); | |
441 | ||
442 | if (per_cpu_mmaps) | |
443 | return perf_evlist__enable_event_cpu(evlist, evsel, idx); | |
444 | else | |
445 | return perf_evlist__enable_event_thread(evlist, evsel, idx); | |
446 | } | |
447 | ||
ad6765dd | 448 | int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
5c581041 | 449 | { |
b3a319d5 NK |
450 | int nr_cpus = cpu_map__nr(evlist->cpus); |
451 | int nr_threads = thread_map__nr(evlist->threads); | |
bf8e8f4b AH |
452 | int nfds = 0; |
453 | struct perf_evsel *evsel; | |
454 | ||
e5cadb93 | 455 | evlist__for_each_entry(evlist, evsel) { |
bf8e8f4b AH |
456 | if (evsel->system_wide) |
457 | nfds += nr_cpus; | |
458 | else | |
459 | nfds += nr_cpus * nr_threads; | |
460 | } | |
461 | ||
1b85337d ACM |
462 | if (fdarray__available_entries(&evlist->pollfd) < nfds && |
463 | fdarray__grow(&evlist->pollfd, nfds) < 0) | |
ad6765dd ACM |
464 | return -ENOMEM; |
465 | ||
466 | return 0; | |
5c581041 | 467 | } |
70082dd9 | 468 | |
4876075b WN |
469 | static int __perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd, |
470 | struct perf_mmap *map, short revent) | |
e4b356b5 | 471 | { |
f3058a1c | 472 | int pos = fdarray__add(&evlist->pollfd, fd, revent | POLLERR | POLLHUP); |
e4b356b5 ACM |
473 | /* |
474 | * Save the idx so that when we filter out fds POLLHUP'ed we can | |
475 | * close the associated evlist->mmap[] entry. | |
476 | */ | |
477 | if (pos >= 0) { | |
4876075b | 478 | evlist->pollfd.priv[pos].ptr = map; |
e4b356b5 ACM |
479 | |
480 | fcntl(fd, F_SETFL, O_NONBLOCK); | |
481 | } | |
482 | ||
483 | return pos; | |
484 | } | |
485 | ||
ad6765dd | 486 | int perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
70082dd9 | 487 | { |
4876075b | 488 | return __perf_evlist__add_pollfd(evlist, fd, NULL, POLLIN); |
e4b356b5 ACM |
489 | } |
490 | ||
258e4bfc WN |
491 | static void perf_evlist__munmap_filtered(struct fdarray *fda, int fd, |
492 | void *arg __maybe_unused) | |
e4b356b5 | 493 | { |
4876075b | 494 | struct perf_mmap *map = fda->priv[fd].ptr; |
1b85337d | 495 | |
4876075b WN |
496 | if (map) |
497 | perf_mmap__put(map); | |
70082dd9 | 498 | } |
70db7533 | 499 | |
1ddec7f0 ACM |
500 | int perf_evlist__filter_pollfd(struct perf_evlist *evlist, short revents_and_mask) |
501 | { | |
e4b356b5 | 502 | return fdarray__filter(&evlist->pollfd, revents_and_mask, |
258e4bfc | 503 | perf_evlist__munmap_filtered, NULL); |
1ddec7f0 ACM |
504 | } |
505 | ||
f66a889d ACM |
506 | int perf_evlist__poll(struct perf_evlist *evlist, int timeout) |
507 | { | |
1b85337d | 508 | return fdarray__poll(&evlist->pollfd, timeout); |
f66a889d ACM |
509 | } |
510 | ||
a91e5431 ACM |
511 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
512 | struct perf_evsel *evsel, | |
513 | int cpu, int thread, u64 id) | |
3d3b5e95 ACM |
514 | { |
515 | int hash; | |
516 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
517 | ||
518 | sid->id = id; | |
519 | sid->evsel = evsel; | |
520 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); | |
521 | hlist_add_head(&sid->node, &evlist->heads[hash]); | |
522 | } | |
523 | ||
a91e5431 ACM |
524 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
525 | int cpu, int thread, u64 id) | |
526 | { | |
527 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); | |
528 | evsel->id[evsel->ids++] = id; | |
529 | } | |
530 | ||
1c59612d JO |
531 | int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
532 | struct perf_evsel *evsel, | |
533 | int cpu, int thread, int fd) | |
f8a95309 | 534 | { |
f8a95309 | 535 | u64 read_data[4] = { 0, }; |
3d3b5e95 | 536 | int id_idx = 1; /* The first entry is the counter value */ |
e2b5abe0 JO |
537 | u64 id; |
538 | int ret; | |
539 | ||
540 | ret = ioctl(fd, PERF_EVENT_IOC_ID, &id); | |
541 | if (!ret) | |
542 | goto add; | |
543 | ||
544 | if (errno != ENOTTY) | |
545 | return -1; | |
546 | ||
547 | /* Legacy way to get event id.. All hail to old kernels! */ | |
f8a95309 | 548 | |
c4861afe JO |
549 | /* |
550 | * This way does not work with group format read, so bail | |
551 | * out in that case. | |
552 | */ | |
553 | if (perf_evlist__read_format(evlist) & PERF_FORMAT_GROUP) | |
554 | return -1; | |
555 | ||
f8a95309 ACM |
556 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
557 | read(fd, &read_data, sizeof(read_data)) == -1) | |
558 | return -1; | |
559 | ||
560 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) | |
561 | ++id_idx; | |
562 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) | |
563 | ++id_idx; | |
564 | ||
e2b5abe0 JO |
565 | id = read_data[id_idx]; |
566 | ||
567 | add: | |
568 | perf_evlist__id_add(evlist, evsel, cpu, thread, id); | |
f8a95309 ACM |
569 | return 0; |
570 | } | |
571 | ||
3c659eed AH |
572 | static void perf_evlist__set_sid_idx(struct perf_evlist *evlist, |
573 | struct perf_evsel *evsel, int idx, int cpu, | |
574 | int thread) | |
575 | { | |
576 | struct perf_sample_id *sid = SID(evsel, cpu, thread); | |
577 | sid->idx = idx; | |
578 | if (evlist->cpus && cpu >= 0) | |
579 | sid->cpu = evlist->cpus->map[cpu]; | |
580 | else | |
581 | sid->cpu = -1; | |
582 | if (!evsel->system_wide && evlist->threads && thread >= 0) | |
e13798c7 | 583 | sid->tid = thread_map__pid(evlist->threads, thread); |
3c659eed AH |
584 | else |
585 | sid->tid = -1; | |
586 | } | |
587 | ||
932a3594 | 588 | struct perf_sample_id *perf_evlist__id2sid(struct perf_evlist *evlist, u64 id) |
70db7533 ACM |
589 | { |
590 | struct hlist_head *head; | |
70db7533 ACM |
591 | struct perf_sample_id *sid; |
592 | int hash; | |
593 | ||
70db7533 ACM |
594 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
595 | head = &evlist->heads[hash]; | |
596 | ||
b67bfe0d | 597 | hlist_for_each_entry(sid, head, node) |
70db7533 | 598 | if (sid->id == id) |
932a3594 JO |
599 | return sid; |
600 | ||
601 | return NULL; | |
602 | } | |
603 | ||
604 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) | |
605 | { | |
606 | struct perf_sample_id *sid; | |
607 | ||
05169df5 | 608 | if (evlist->nr_entries == 1 || !id) |
932a3594 JO |
609 | return perf_evlist__first(evlist); |
610 | ||
611 | sid = perf_evlist__id2sid(evlist, id); | |
612 | if (sid) | |
613 | return sid->evsel; | |
30e68bcc NK |
614 | |
615 | if (!perf_evlist__sample_id_all(evlist)) | |
0c21f736 | 616 | return perf_evlist__first(evlist); |
30e68bcc | 617 | |
70db7533 ACM |
618 | return NULL; |
619 | } | |
04391deb | 620 | |
dddcf6ab AH |
621 | struct perf_evsel *perf_evlist__id2evsel_strict(struct perf_evlist *evlist, |
622 | u64 id) | |
623 | { | |
624 | struct perf_sample_id *sid; | |
625 | ||
626 | if (!id) | |
627 | return NULL; | |
628 | ||
629 | sid = perf_evlist__id2sid(evlist, id); | |
630 | if (sid) | |
631 | return sid->evsel; | |
632 | ||
633 | return NULL; | |
634 | } | |
635 | ||
75562573 AH |
636 | static int perf_evlist__event2id(struct perf_evlist *evlist, |
637 | union perf_event *event, u64 *id) | |
638 | { | |
639 | const u64 *array = event->sample.array; | |
640 | ssize_t n; | |
641 | ||
642 | n = (event->header.size - sizeof(event->header)) >> 3; | |
643 | ||
644 | if (event->header.type == PERF_RECORD_SAMPLE) { | |
645 | if (evlist->id_pos >= n) | |
646 | return -1; | |
647 | *id = array[evlist->id_pos]; | |
648 | } else { | |
649 | if (evlist->is_pos > n) | |
650 | return -1; | |
651 | n -= evlist->is_pos; | |
652 | *id = array[n]; | |
653 | } | |
654 | return 0; | |
655 | } | |
656 | ||
7cb5c5ac JO |
657 | struct perf_evsel *perf_evlist__event2evsel(struct perf_evlist *evlist, |
658 | union perf_event *event) | |
75562573 | 659 | { |
98be6966 | 660 | struct perf_evsel *first = perf_evlist__first(evlist); |
75562573 AH |
661 | struct hlist_head *head; |
662 | struct perf_sample_id *sid; | |
663 | int hash; | |
664 | u64 id; | |
665 | ||
666 | if (evlist->nr_entries == 1) | |
98be6966 AH |
667 | return first; |
668 | ||
669 | if (!first->attr.sample_id_all && | |
670 | event->header.type != PERF_RECORD_SAMPLE) | |
671 | return first; | |
75562573 AH |
672 | |
673 | if (perf_evlist__event2id(evlist, event, &id)) | |
674 | return NULL; | |
675 | ||
676 | /* Synthesized events have an id of zero */ | |
677 | if (!id) | |
98be6966 | 678 | return first; |
75562573 AH |
679 | |
680 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); | |
681 | head = &evlist->heads[hash]; | |
682 | ||
683 | hlist_for_each_entry(sid, head, node) { | |
684 | if (sid->id == id) | |
685 | return sid->evsel; | |
686 | } | |
687 | return NULL; | |
688 | } | |
689 | ||
65aea233 WN |
690 | static int perf_evlist__set_paused(struct perf_evlist *evlist, bool value) |
691 | { | |
692 | int i; | |
693 | ||
078c3386 WN |
694 | if (!evlist->backward_mmap) |
695 | return 0; | |
696 | ||
65aea233 | 697 | for (i = 0; i < evlist->nr_mmaps; i++) { |
078c3386 | 698 | int fd = evlist->backward_mmap[i].fd; |
65aea233 WN |
699 | int err; |
700 | ||
701 | if (fd < 0) | |
702 | continue; | |
703 | err = ioctl(fd, PERF_EVENT_IOC_PAUSE_OUTPUT, value ? 1 : 0); | |
704 | if (err) | |
705 | return err; | |
706 | } | |
707 | return 0; | |
708 | } | |
709 | ||
710 | int perf_evlist__pause(struct perf_evlist *evlist) | |
711 | { | |
712 | return perf_evlist__set_paused(evlist, true); | |
713 | } | |
714 | ||
715 | int perf_evlist__resume(struct perf_evlist *evlist) | |
716 | { | |
717 | return perf_evlist__set_paused(evlist, false); | |
718 | } | |
719 | ||
b6b85dad | 720 | /* When check_messup is true, 'end' must points to a good entry */ |
0f4ccd11 | 721 | static union perf_event * |
b6b85dad WN |
722 | perf_mmap__read(struct perf_mmap *md, bool check_messup, u64 start, |
723 | u64 end, u64 *prev) | |
04391deb | 724 | { |
04391deb | 725 | unsigned char *data = md->base + page_size; |
8115d60c | 726 | union perf_event *event = NULL; |
b6b85dad | 727 | int diff = end - start; |
04391deb | 728 | |
b6b85dad | 729 | if (check_messup) { |
04391deb | 730 | /* |
7bb41152 ACM |
731 | * If we're further behind than half the buffer, there's a chance |
732 | * the writer will bite our tail and mess up the samples under us. | |
733 | * | |
b6b85dad | 734 | * If we somehow ended up ahead of the 'end', we got messed up. |
7bb41152 | 735 | * |
b6b85dad | 736 | * In either case, truncate and restart at 'end'. |
04391deb | 737 | */ |
7bb41152 ACM |
738 | if (diff > md->mask / 2 || diff < 0) { |
739 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); | |
740 | ||
741 | /* | |
b6b85dad | 742 | * 'end' points to a known good entry, start there. |
7bb41152 | 743 | */ |
b6b85dad | 744 | start = end; |
b04b7023 | 745 | diff = 0; |
7bb41152 | 746 | } |
04391deb ACM |
747 | } |
748 | ||
b04b7023 | 749 | if (diff >= (int)sizeof(event->header)) { |
04391deb ACM |
750 | size_t size; |
751 | ||
b6b85dad | 752 | event = (union perf_event *)&data[start & md->mask]; |
04391deb ACM |
753 | size = event->header.size; |
754 | ||
b04b7023 WN |
755 | if (size < sizeof(event->header) || diff < (int)size) { |
756 | event = NULL; | |
757 | goto broken_event; | |
758 | } | |
759 | ||
04391deb ACM |
760 | /* |
761 | * Event straddles the mmap boundary -- header should always | |
762 | * be inside due to u64 alignment of output. | |
763 | */ | |
b6b85dad WN |
764 | if ((start & md->mask) + size != ((start + size) & md->mask)) { |
765 | unsigned int offset = start; | |
04391deb | 766 | unsigned int len = min(sizeof(*event), size), cpy; |
a65cb4b9 | 767 | void *dst = md->event_copy; |
04391deb ACM |
768 | |
769 | do { | |
770 | cpy = min(md->mask + 1 - (offset & md->mask), len); | |
771 | memcpy(dst, &data[offset & md->mask], cpy); | |
772 | offset += cpy; | |
773 | dst += cpy; | |
774 | len -= cpy; | |
775 | } while (len); | |
776 | ||
a65cb4b9 | 777 | event = (union perf_event *) md->event_copy; |
04391deb ACM |
778 | } |
779 | ||
b6b85dad | 780 | start += size; |
04391deb ACM |
781 | } |
782 | ||
b04b7023 | 783 | broken_event: |
0f4ccd11 | 784 | if (prev) |
b6b85dad | 785 | *prev = start; |
7bb41152 | 786 | |
04391deb ACM |
787 | return event; |
788 | } | |
f8a95309 | 789 | |
8db6d6b1 | 790 | union perf_event *perf_mmap__read_forward(struct perf_mmap *md, bool check_messup) |
0f4ccd11 | 791 | { |
0f4ccd11 WN |
792 | u64 head; |
793 | u64 old = md->prev; | |
794 | ||
795 | /* | |
796 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
797 | */ | |
798 | if (!atomic_read(&md->refcnt)) | |
799 | return NULL; | |
800 | ||
801 | head = perf_mmap__read_head(md); | |
802 | ||
8db6d6b1 | 803 | return perf_mmap__read(md, check_messup, old, head, &md->prev); |
0f4ccd11 WN |
804 | } |
805 | ||
e24c7520 | 806 | union perf_event * |
8db6d6b1 | 807 | perf_mmap__read_backward(struct perf_mmap *md) |
e24c7520 | 808 | { |
e24c7520 WN |
809 | u64 head, end; |
810 | u64 start = md->prev; | |
811 | ||
812 | /* | |
813 | * Check if event was unmapped due to a POLLHUP/POLLERR. | |
814 | */ | |
815 | if (!atomic_read(&md->refcnt)) | |
816 | return NULL; | |
817 | ||
818 | head = perf_mmap__read_head(md); | |
819 | if (!head) | |
820 | return NULL; | |
821 | ||
822 | /* | |
823 | * 'head' pointer starts from 0. Kernel minus sizeof(record) form | |
824 | * it each time when kernel writes to it, so in fact 'head' is | |
825 | * negative. 'end' pointer is made manually by adding the size of | |
826 | * the ring buffer to 'head' pointer, means the validate data can | |
827 | * read is the whole ring buffer. If 'end' is positive, the ring | |
828 | * buffer has not fully filled, so we must adjust 'end' to 0. | |
829 | * | |
830 | * However, since both 'head' and 'end' is unsigned, we can't | |
831 | * simply compare 'end' against 0. Here we compare '-head' and | |
832 | * the size of the ring buffer, where -head is the number of bytes | |
833 | * kernel write to the ring buffer. | |
834 | */ | |
835 | if (-head < (u64)(md->mask + 1)) | |
836 | end = 0; | |
837 | else | |
838 | end = head + md->mask + 1; | |
839 | ||
840 | return perf_mmap__read(md, false, start, end, &md->prev); | |
841 | } | |
842 | ||
8db6d6b1 WN |
843 | union perf_event *perf_evlist__mmap_read_forward(struct perf_evlist *evlist, int idx) |
844 | { | |
845 | struct perf_mmap *md = &evlist->mmap[idx]; | |
846 | ||
847 | /* | |
848 | * Check messup is required for forward overwritable ring buffer: | |
849 | * memory pointed by md->prev can be overwritten in this case. | |
850 | * No need for read-write ring buffer: kernel stop outputting when | |
851 | * it hit md->prev (perf_mmap__consume()). | |
852 | */ | |
853 | return perf_mmap__read_forward(md, evlist->overwrite); | |
854 | } | |
855 | ||
856 | union perf_event *perf_evlist__mmap_read_backward(struct perf_evlist *evlist, int idx) | |
857 | { | |
858 | struct perf_mmap *md = &evlist->mmap[idx]; | |
859 | ||
860 | /* | |
861 | * No need to check messup for backward ring buffer: | |
862 | * We can always read arbitrary long data from a backward | |
863 | * ring buffer unless we forget to pause it before reading. | |
864 | */ | |
865 | return perf_mmap__read_backward(md); | |
866 | } | |
867 | ||
5a5ddeb6 WN |
868 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
869 | { | |
870 | if (!evlist->backward) | |
871 | return perf_evlist__mmap_read_forward(evlist, idx); | |
872 | return perf_evlist__mmap_read_backward(evlist, idx); | |
873 | } | |
874 | ||
8db6d6b1 | 875 | void perf_mmap__read_catchup(struct perf_mmap *md) |
e24c7520 | 876 | { |
e24c7520 WN |
877 | u64 head; |
878 | ||
879 | if (!atomic_read(&md->refcnt)) | |
880 | return; | |
881 | ||
882 | head = perf_mmap__read_head(md); | |
883 | md->prev = head; | |
884 | } | |
885 | ||
8db6d6b1 WN |
886 | void perf_evlist__mmap_read_catchup(struct perf_evlist *evlist, int idx) |
887 | { | |
888 | perf_mmap__read_catchup(&evlist->mmap[idx]); | |
889 | } | |
890 | ||
82396986 ACM |
891 | static bool perf_mmap__empty(struct perf_mmap *md) |
892 | { | |
b72e74d1 | 893 | return perf_mmap__read_head(md) == md->prev && !md->auxtrace_mmap.base; |
82396986 ACM |
894 | } |
895 | ||
8db6d6b1 | 896 | static void perf_mmap__get(struct perf_mmap *map) |
82396986 | 897 | { |
8db6d6b1 | 898 | atomic_inc(&map->refcnt); |
82396986 ACM |
899 | } |
900 | ||
8db6d6b1 | 901 | static void perf_mmap__put(struct perf_mmap *md) |
82396986 | 902 | { |
e10e4ef6 | 903 | BUG_ON(md->base && atomic_read(&md->refcnt) == 0); |
82396986 | 904 | |
e10e4ef6 | 905 | if (atomic_dec_and_test(&md->refcnt)) |
8db6d6b1 | 906 | perf_mmap__munmap(md); |
82396986 ACM |
907 | } |
908 | ||
8db6d6b1 WN |
909 | void perf_mmap__consume(struct perf_mmap *md, bool overwrite) |
910 | { | |
911 | if (!overwrite) { | |
7b8283b5 | 912 | u64 old = md->prev; |
8e50d384 ZZ |
913 | |
914 | perf_mmap__write_tail(md, old); | |
915 | } | |
82396986 | 916 | |
7143849a | 917 | if (atomic_read(&md->refcnt) == 1 && perf_mmap__empty(md)) |
8db6d6b1 WN |
918 | perf_mmap__put(md); |
919 | } | |
920 | ||
921 | void perf_evlist__mmap_consume(struct perf_evlist *evlist, int idx) | |
922 | { | |
923 | perf_mmap__consume(&evlist->mmap[idx], evlist->overwrite); | |
8e50d384 ZZ |
924 | } |
925 | ||
718c602d AH |
926 | int __weak auxtrace_mmap__mmap(struct auxtrace_mmap *mm __maybe_unused, |
927 | struct auxtrace_mmap_params *mp __maybe_unused, | |
928 | void *userpg __maybe_unused, | |
929 | int fd __maybe_unused) | |
930 | { | |
931 | return 0; | |
932 | } | |
933 | ||
934 | void __weak auxtrace_mmap__munmap(struct auxtrace_mmap *mm __maybe_unused) | |
935 | { | |
936 | } | |
937 | ||
938 | void __weak auxtrace_mmap_params__init( | |
939 | struct auxtrace_mmap_params *mp __maybe_unused, | |
940 | off_t auxtrace_offset __maybe_unused, | |
941 | unsigned int auxtrace_pages __maybe_unused, | |
942 | bool auxtrace_overwrite __maybe_unused) | |
943 | { | |
944 | } | |
945 | ||
946 | void __weak auxtrace_mmap_params__set_idx( | |
947 | struct auxtrace_mmap_params *mp __maybe_unused, | |
948 | struct perf_evlist *evlist __maybe_unused, | |
949 | int idx __maybe_unused, | |
950 | bool per_cpu __maybe_unused) | |
951 | { | |
952 | } | |
953 | ||
8db6d6b1 | 954 | static void perf_mmap__munmap(struct perf_mmap *map) |
93edcbd9 | 955 | { |
8db6d6b1 WN |
956 | if (map->base != NULL) { |
957 | munmap(map->base, perf_mmap__mmap_len(map)); | |
958 | map->base = NULL; | |
959 | map->fd = -1; | |
960 | atomic_set(&map->refcnt, 0); | |
93edcbd9 | 961 | } |
8db6d6b1 WN |
962 | auxtrace_mmap__munmap(&map->auxtrace_mmap); |
963 | } | |
964 | ||
a1f72618 | 965 | static void perf_evlist__munmap_nofree(struct perf_evlist *evlist) |
f8a95309 | 966 | { |
aece948f | 967 | int i; |
f8a95309 | 968 | |
b2cb615d WN |
969 | if (evlist->mmap) |
970 | for (i = 0; i < evlist->nr_mmaps; i++) | |
971 | perf_mmap__munmap(&evlist->mmap[i]); | |
983874d1 | 972 | |
b2cb615d WN |
973 | if (evlist->backward_mmap) |
974 | for (i = 0; i < evlist->nr_mmaps; i++) | |
975 | perf_mmap__munmap(&evlist->backward_mmap[i]); | |
a1f72618 | 976 | } |
aece948f | 977 | |
a1f72618 WN |
978 | void perf_evlist__munmap(struct perf_evlist *evlist) |
979 | { | |
980 | perf_evlist__munmap_nofree(evlist); | |
04662523 | 981 | zfree(&evlist->mmap); |
b2cb615d | 982 | zfree(&evlist->backward_mmap); |
f8a95309 ACM |
983 | } |
984 | ||
8db6d6b1 | 985 | static struct perf_mmap *perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
f8a95309 | 986 | { |
d4c6fb36 | 987 | int i; |
8db6d6b1 | 988 | struct perf_mmap *map; |
d4c6fb36 | 989 | |
a14bb7a6 | 990 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
ec1e7e43 | 991 | if (cpu_map__empty(evlist->cpus)) |
b3a319d5 | 992 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
8db6d6b1 WN |
993 | map = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
994 | if (!map) | |
995 | return NULL; | |
946ae1d4 | 996 | |
d4c6fb36 | 997 | for (i = 0; i < evlist->nr_mmaps; i++) |
8db6d6b1 WN |
998 | map[i].fd = -1; |
999 | return map; | |
f8a95309 ACM |
1000 | } |
1001 | ||
a8a8f3eb AH |
1002 | struct mmap_params { |
1003 | int prot; | |
1004 | int mask; | |
718c602d | 1005 | struct auxtrace_mmap_params auxtrace_mp; |
a8a8f3eb AH |
1006 | }; |
1007 | ||
8db6d6b1 WN |
1008 | static int perf_mmap__mmap(struct perf_mmap *map, |
1009 | struct mmap_params *mp, int fd) | |
f8a95309 | 1010 | { |
82396986 ACM |
1011 | /* |
1012 | * The last one will be done at perf_evlist__mmap_consume(), so that we | |
1013 | * make sure we don't prevent tools from consuming every last event in | |
1014 | * the ring buffer. | |
1015 | * | |
1016 | * I.e. we can get the POLLHUP meaning that the fd doesn't exist | |
1017 | * anymore, but the last events for it are still in the ring buffer, | |
1018 | * waiting to be consumed. | |
1019 | * | |
1020 | * Tools can chose to ignore this at their own discretion, but the | |
1021 | * evlist layer can't just drop it when filtering events in | |
1022 | * perf_evlist__filter_pollfd(). | |
1023 | */ | |
8db6d6b1 WN |
1024 | atomic_set(&map->refcnt, 2); |
1025 | map->prev = 0; | |
1026 | map->mask = mp->mask; | |
1027 | map->base = mmap(NULL, perf_mmap__mmap_len(map), mp->prot, | |
1028 | MAP_SHARED, fd, 0); | |
1029 | if (map->base == MAP_FAILED) { | |
02635965 AH |
1030 | pr_debug2("failed to mmap perf event ring buffer, error %d\n", |
1031 | errno); | |
8db6d6b1 | 1032 | map->base = NULL; |
f8a95309 | 1033 | return -1; |
301b195d | 1034 | } |
8db6d6b1 | 1035 | map->fd = fd; |
ad6765dd | 1036 | |
8db6d6b1 WN |
1037 | if (auxtrace_mmap__mmap(&map->auxtrace_mmap, |
1038 | &mp->auxtrace_mp, map->base, fd)) | |
718c602d AH |
1039 | return -1; |
1040 | ||
f8a95309 ACM |
1041 | return 0; |
1042 | } | |
1043 | ||
f3058a1c WN |
1044 | static bool |
1045 | perf_evlist__should_poll(struct perf_evlist *evlist __maybe_unused, | |
1046 | struct perf_evsel *evsel) | |
1047 | { | |
32a951b4 | 1048 | if (evsel->attr.write_backward) |
f3058a1c WN |
1049 | return false; |
1050 | return true; | |
1051 | } | |
1052 | ||
04e21314 | 1053 | static int perf_evlist__mmap_per_evsel(struct perf_evlist *evlist, int idx, |
a8a8f3eb | 1054 | struct mmap_params *mp, int cpu, |
078c3386 | 1055 | int thread, int *_output, int *_output_backward) |
aece948f ACM |
1056 | { |
1057 | struct perf_evsel *evsel; | |
f3058a1c | 1058 | int revent; |
04e21314 | 1059 | |
e5cadb93 | 1060 | evlist__for_each_entry(evlist, evsel) { |
078c3386 WN |
1061 | struct perf_mmap *maps = evlist->mmap; |
1062 | int *output = _output; | |
bf8e8f4b AH |
1063 | int fd; |
1064 | ||
078c3386 WN |
1065 | if (evsel->attr.write_backward) { |
1066 | output = _output_backward; | |
1067 | maps = evlist->backward_mmap; | |
1068 | ||
1069 | if (!maps) { | |
1070 | maps = perf_evlist__alloc_mmap(evlist); | |
1071 | if (!maps) | |
1072 | return -1; | |
1073 | evlist->backward_mmap = maps; | |
1074 | } | |
1075 | } | |
f3058a1c | 1076 | |
bf8e8f4b AH |
1077 | if (evsel->system_wide && thread) |
1078 | continue; | |
1079 | ||
1080 | fd = FD(evsel, cpu, thread); | |
04e21314 AH |
1081 | |
1082 | if (*output == -1) { | |
1083 | *output = fd; | |
078c3386 WN |
1084 | |
1085 | if (perf_mmap__mmap(&maps[idx], mp, *output) < 0) | |
04e21314 AH |
1086 | return -1; |
1087 | } else { | |
1088 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, *output) != 0) | |
1089 | return -1; | |
82396986 | 1090 | |
078c3386 | 1091 | perf_mmap__get(&maps[idx]); |
04e21314 AH |
1092 | } |
1093 | ||
f3058a1c WN |
1094 | revent = perf_evlist__should_poll(evlist, evsel) ? POLLIN : 0; |
1095 | ||
f90d194a AH |
1096 | /* |
1097 | * The system_wide flag causes a selected event to be opened | |
1098 | * always without a pid. Consequently it will never get a | |
1099 | * POLLHUP, but it is used for tracking in combination with | |
1100 | * other events, so it should not need to be polled anyway. | |
1101 | * Therefore don't add it for polling. | |
1102 | */ | |
1103 | if (!evsel->system_wide && | |
078c3386 WN |
1104 | __perf_evlist__add_pollfd(evlist, fd, &maps[idx], revent) < 0) { |
1105 | perf_mmap__put(&maps[idx]); | |
ad6765dd | 1106 | return -1; |
82396986 | 1107 | } |
033fa713 | 1108 | |
3c659eed AH |
1109 | if (evsel->attr.read_format & PERF_FORMAT_ID) { |
1110 | if (perf_evlist__id_add_fd(evlist, evsel, cpu, thread, | |
1111 | fd) < 0) | |
1112 | return -1; | |
1113 | perf_evlist__set_sid_idx(evlist, evsel, idx, cpu, | |
1114 | thread); | |
1115 | } | |
04e21314 AH |
1116 | } |
1117 | ||
1118 | return 0; | |
1119 | } | |
1120 | ||
a8a8f3eb AH |
1121 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, |
1122 | struct mmap_params *mp) | |
04e21314 | 1123 | { |
aece948f | 1124 | int cpu, thread; |
b3a319d5 NK |
1125 | int nr_cpus = cpu_map__nr(evlist->cpus); |
1126 | int nr_threads = thread_map__nr(evlist->threads); | |
aece948f | 1127 | |
e3e1a54f | 1128 | pr_debug2("perf event ring buffer mmapped per cpu\n"); |
b3a319d5 | 1129 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
aece948f | 1130 | int output = -1; |
078c3386 | 1131 | int output_backward = -1; |
aece948f | 1132 | |
718c602d AH |
1133 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, cpu, |
1134 | true); | |
1135 | ||
b3a319d5 | 1136 | for (thread = 0; thread < nr_threads; thread++) { |
a8a8f3eb | 1137 | if (perf_evlist__mmap_per_evsel(evlist, cpu, mp, cpu, |
078c3386 | 1138 | thread, &output, &output_backward)) |
04e21314 | 1139 | goto out_unmap; |
aece948f ACM |
1140 | } |
1141 | } | |
1142 | ||
1143 | return 0; | |
1144 | ||
1145 | out_unmap: | |
a1f72618 | 1146 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
1147 | return -1; |
1148 | } | |
1149 | ||
a8a8f3eb AH |
1150 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, |
1151 | struct mmap_params *mp) | |
aece948f | 1152 | { |
aece948f | 1153 | int thread; |
b3a319d5 | 1154 | int nr_threads = thread_map__nr(evlist->threads); |
aece948f | 1155 | |
e3e1a54f | 1156 | pr_debug2("perf event ring buffer mmapped per thread\n"); |
b3a319d5 | 1157 | for (thread = 0; thread < nr_threads; thread++) { |
aece948f | 1158 | int output = -1; |
078c3386 | 1159 | int output_backward = -1; |
aece948f | 1160 | |
718c602d AH |
1161 | auxtrace_mmap_params__set_idx(&mp->auxtrace_mp, evlist, thread, |
1162 | false); | |
1163 | ||
a8a8f3eb | 1164 | if (perf_evlist__mmap_per_evsel(evlist, thread, mp, 0, thread, |
078c3386 | 1165 | &output, &output_backward)) |
04e21314 | 1166 | goto out_unmap; |
aece948f ACM |
1167 | } |
1168 | ||
1169 | return 0; | |
1170 | ||
1171 | out_unmap: | |
a1f72618 | 1172 | perf_evlist__munmap_nofree(evlist); |
aece948f ACM |
1173 | return -1; |
1174 | } | |
1175 | ||
f5e7150c | 1176 | unsigned long perf_event_mlock_kb_in_pages(void) |
994a1f78 | 1177 | { |
f5e7150c ACM |
1178 | unsigned long pages; |
1179 | int max; | |
8185e881 | 1180 | |
f5e7150c ACM |
1181 | if (sysctl__read_int("kernel/perf_event_mlock_kb", &max) < 0) { |
1182 | /* | |
1183 | * Pick a once upon a time good value, i.e. things look | |
1184 | * strange since we can't read a sysctl value, but lets not | |
1185 | * die yet... | |
1186 | */ | |
1187 | max = 512; | |
1188 | } else { | |
1189 | max -= (page_size / 1024); | |
1190 | } | |
8185e881 | 1191 | |
f5e7150c ACM |
1192 | pages = (max * 1024) / page_size; |
1193 | if (!is_power_of_2(pages)) | |
1194 | pages = rounddown_pow_of_two(pages); | |
1195 | ||
1196 | return pages; | |
1197 | } | |
1198 | ||
1199 | static size_t perf_evlist__mmap_size(unsigned long pages) | |
1200 | { | |
1201 | if (pages == UINT_MAX) | |
1202 | pages = perf_event_mlock_kb_in_pages(); | |
1203 | else if (!is_power_of_2(pages)) | |
994a1f78 JO |
1204 | return 0; |
1205 | ||
1206 | return (pages + 1) * page_size; | |
1207 | } | |
1208 | ||
33c2dcfd DA |
1209 | static long parse_pages_arg(const char *str, unsigned long min, |
1210 | unsigned long max) | |
994a1f78 | 1211 | { |
2fbe4abe | 1212 | unsigned long pages, val; |
27050f53 JO |
1213 | static struct parse_tag tags[] = { |
1214 | { .tag = 'B', .mult = 1 }, | |
1215 | { .tag = 'K', .mult = 1 << 10 }, | |
1216 | { .tag = 'M', .mult = 1 << 20 }, | |
1217 | { .tag = 'G', .mult = 1 << 30 }, | |
1218 | { .tag = 0 }, | |
1219 | }; | |
994a1f78 | 1220 | |
8973504b | 1221 | if (str == NULL) |
33c2dcfd | 1222 | return -EINVAL; |
8973504b | 1223 | |
27050f53 | 1224 | val = parse_tag_value(str, tags); |
2fbe4abe | 1225 | if (val != (unsigned long) -1) { |
27050f53 JO |
1226 | /* we got file size value */ |
1227 | pages = PERF_ALIGN(val, page_size) / page_size; | |
27050f53 JO |
1228 | } else { |
1229 | /* we got pages count value */ | |
1230 | char *eptr; | |
1231 | pages = strtoul(str, &eptr, 10); | |
33c2dcfd DA |
1232 | if (*eptr != '\0') |
1233 | return -EINVAL; | |
994a1f78 JO |
1234 | } |
1235 | ||
2bcab6c1 | 1236 | if (pages == 0 && min == 0) { |
33c2dcfd | 1237 | /* leave number of pages at 0 */ |
1dbfa938 | 1238 | } else if (!is_power_of_2(pages)) { |
33c2dcfd | 1239 | /* round pages up to next power of 2 */ |
91529834 | 1240 | pages = roundup_pow_of_two(pages); |
1dbfa938 AH |
1241 | if (!pages) |
1242 | return -EINVAL; | |
9639837e DA |
1243 | pr_info("rounding mmap pages size to %lu bytes (%lu pages)\n", |
1244 | pages * page_size, pages); | |
2fbe4abe AH |
1245 | } |
1246 | ||
33c2dcfd DA |
1247 | if (pages > max) |
1248 | return -EINVAL; | |
1249 | ||
1250 | return pages; | |
1251 | } | |
1252 | ||
e9db1310 | 1253 | int __perf_evlist__parse_mmap_pages(unsigned int *mmap_pages, const char *str) |
33c2dcfd | 1254 | { |
33c2dcfd DA |
1255 | unsigned long max = UINT_MAX; |
1256 | long pages; | |
1257 | ||
f5ae9c42 | 1258 | if (max > SIZE_MAX / page_size) |
33c2dcfd DA |
1259 | max = SIZE_MAX / page_size; |
1260 | ||
1261 | pages = parse_pages_arg(str, 1, max); | |
1262 | if (pages < 0) { | |
1263 | pr_err("Invalid argument for --mmap_pages/-m\n"); | |
994a1f78 JO |
1264 | return -1; |
1265 | } | |
1266 | ||
1267 | *mmap_pages = pages; | |
1268 | return 0; | |
1269 | } | |
1270 | ||
e9db1310 AH |
1271 | int perf_evlist__parse_mmap_pages(const struct option *opt, const char *str, |
1272 | int unset __maybe_unused) | |
1273 | { | |
1274 | return __perf_evlist__parse_mmap_pages(opt->value, str); | |
1275 | } | |
1276 | ||
c83fa7f2 | 1277 | /** |
718c602d | 1278 | * perf_evlist__mmap_ex - Create mmaps to receive events. |
c83fa7f2 AH |
1279 | * @evlist: list of events |
1280 | * @pages: map length in pages | |
1281 | * @overwrite: overwrite older events? | |
718c602d AH |
1282 | * @auxtrace_pages - auxtrace map length in pages |
1283 | * @auxtrace_overwrite - overwrite older auxtrace data? | |
f8a95309 | 1284 | * |
c83fa7f2 AH |
1285 | * If @overwrite is %false the user needs to signal event consumption using |
1286 | * perf_mmap__write_tail(). Using perf_evlist__mmap_read() does this | |
1287 | * automatically. | |
7e2ed097 | 1288 | * |
718c602d AH |
1289 | * Similarly, if @auxtrace_overwrite is %false the user needs to signal data |
1290 | * consumption using auxtrace_mmap__write_tail(). | |
1291 | * | |
c83fa7f2 | 1292 | * Return: %0 on success, negative error code otherwise. |
f8a95309 | 1293 | */ |
718c602d AH |
1294 | int perf_evlist__mmap_ex(struct perf_evlist *evlist, unsigned int pages, |
1295 | bool overwrite, unsigned int auxtrace_pages, | |
1296 | bool auxtrace_overwrite) | |
f8a95309 | 1297 | { |
aece948f | 1298 | struct perf_evsel *evsel; |
7e2ed097 ACM |
1299 | const struct cpu_map *cpus = evlist->cpus; |
1300 | const struct thread_map *threads = evlist->threads; | |
a8a8f3eb AH |
1301 | struct mmap_params mp = { |
1302 | .prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), | |
1303 | }; | |
50a682ce | 1304 | |
8db6d6b1 WN |
1305 | if (!evlist->mmap) |
1306 | evlist->mmap = perf_evlist__alloc_mmap(evlist); | |
1307 | if (!evlist->mmap) | |
f8a95309 ACM |
1308 | return -ENOMEM; |
1309 | ||
1b85337d | 1310 | if (evlist->pollfd.entries == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
f8a95309 ACM |
1311 | return -ENOMEM; |
1312 | ||
1313 | evlist->overwrite = overwrite; | |
994a1f78 | 1314 | evlist->mmap_len = perf_evlist__mmap_size(pages); |
2af68ef5 | 1315 | pr_debug("mmap size %zuB\n", evlist->mmap_len); |
a8a8f3eb | 1316 | mp.mask = evlist->mmap_len - page_size - 1; |
f8a95309 | 1317 | |
718c602d AH |
1318 | auxtrace_mmap_params__init(&mp.auxtrace_mp, evlist->mmap_len, |
1319 | auxtrace_pages, auxtrace_overwrite); | |
1320 | ||
e5cadb93 | 1321 | evlist__for_each_entry(evlist, evsel) { |
f8a95309 | 1322 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
a91e5431 | 1323 | evsel->sample_id == NULL && |
a14bb7a6 | 1324 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
f8a95309 | 1325 | return -ENOMEM; |
f8a95309 ACM |
1326 | } |
1327 | ||
ec1e7e43 | 1328 | if (cpu_map__empty(cpus)) |
a8a8f3eb | 1329 | return perf_evlist__mmap_per_thread(evlist, &mp); |
f8a95309 | 1330 | |
a8a8f3eb | 1331 | return perf_evlist__mmap_per_cpu(evlist, &mp); |
f8a95309 | 1332 | } |
7e2ed097 | 1333 | |
718c602d AH |
1334 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
1335 | bool overwrite) | |
1336 | { | |
1337 | return perf_evlist__mmap_ex(evlist, pages, overwrite, 0, false); | |
1338 | } | |
1339 | ||
602ad878 | 1340 | int perf_evlist__create_maps(struct perf_evlist *evlist, struct target *target) |
7e2ed097 | 1341 | { |
74bfd2b2 AH |
1342 | struct cpu_map *cpus; |
1343 | struct thread_map *threads; | |
7e2ed097 | 1344 | |
74bfd2b2 | 1345 | threads = thread_map__new_str(target->pid, target->tid, target->uid); |
7e2ed097 | 1346 | |
74bfd2b2 | 1347 | if (!threads) |
7e2ed097 ACM |
1348 | return -1; |
1349 | ||
9c105fbc | 1350 | if (target__uses_dummy_map(target)) |
74bfd2b2 | 1351 | cpus = cpu_map__dummy_new(); |
879d77d0 | 1352 | else |
74bfd2b2 | 1353 | cpus = cpu_map__new(target->cpu_list); |
7e2ed097 | 1354 | |
74bfd2b2 | 1355 | if (!cpus) |
7e2ed097 ACM |
1356 | goto out_delete_threads; |
1357 | ||
ec9a77a7 AH |
1358 | evlist->has_user_cpus = !!target->cpu_list; |
1359 | ||
74bfd2b2 | 1360 | perf_evlist__set_maps(evlist, cpus, threads); |
d5bc056e AH |
1361 | |
1362 | return 0; | |
7e2ed097 ACM |
1363 | |
1364 | out_delete_threads: | |
74bfd2b2 | 1365 | thread_map__put(threads); |
7e2ed097 ACM |
1366 | return -1; |
1367 | } | |
1368 | ||
d5bc056e AH |
1369 | void perf_evlist__set_maps(struct perf_evlist *evlist, struct cpu_map *cpus, |
1370 | struct thread_map *threads) | |
3de5cfb0 | 1371 | { |
934e0f20 AH |
1372 | /* |
1373 | * Allow for the possibility that one or another of the maps isn't being | |
1374 | * changed i.e. don't put it. Note we are assuming the maps that are | |
1375 | * being applied are brand new and evlist is taking ownership of the | |
1376 | * original reference count of 1. If that is not the case it is up to | |
1377 | * the caller to increase the reference count. | |
1378 | */ | |
1379 | if (cpus != evlist->cpus) { | |
3de5cfb0 | 1380 | cpu_map__put(evlist->cpus); |
a55e5663 | 1381 | evlist->cpus = cpu_map__get(cpus); |
934e0f20 | 1382 | } |
3de5cfb0 | 1383 | |
934e0f20 | 1384 | if (threads != evlist->threads) { |
3de5cfb0 | 1385 | thread_map__put(evlist->threads); |
a55e5663 | 1386 | evlist->threads = thread_map__get(threads); |
934e0f20 | 1387 | } |
3de5cfb0 | 1388 | |
ec9a77a7 | 1389 | perf_evlist__propagate_maps(evlist); |
3de5cfb0 JO |
1390 | } |
1391 | ||
22c8a376 ACM |
1392 | void __perf_evlist__set_sample_bit(struct perf_evlist *evlist, |
1393 | enum perf_event_sample_format bit) | |
1394 | { | |
1395 | struct perf_evsel *evsel; | |
1396 | ||
e5cadb93 | 1397 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1398 | __perf_evsel__set_sample_bit(evsel, bit); |
1399 | } | |
1400 | ||
1401 | void __perf_evlist__reset_sample_bit(struct perf_evlist *evlist, | |
1402 | enum perf_event_sample_format bit) | |
1403 | { | |
1404 | struct perf_evsel *evsel; | |
1405 | ||
e5cadb93 | 1406 | evlist__for_each_entry(evlist, evsel) |
22c8a376 ACM |
1407 | __perf_evsel__reset_sample_bit(evsel, bit); |
1408 | } | |
1409 | ||
23d4aad4 | 1410 | int perf_evlist__apply_filters(struct perf_evlist *evlist, struct perf_evsel **err_evsel) |
0a102479 | 1411 | { |
0a102479 | 1412 | struct perf_evsel *evsel; |
745cefc5 ACM |
1413 | int err = 0; |
1414 | const int ncpus = cpu_map__nr(evlist->cpus), | |
b3a319d5 | 1415 | nthreads = thread_map__nr(evlist->threads); |
0a102479 | 1416 | |
e5cadb93 | 1417 | evlist__for_each_entry(evlist, evsel) { |
745cefc5 | 1418 | if (evsel->filter == NULL) |
0a102479 | 1419 | continue; |
745cefc5 | 1420 | |
d988d5ee KL |
1421 | /* |
1422 | * filters only work for tracepoint event, which doesn't have cpu limit. | |
1423 | * So evlist and evsel should always be same. | |
1424 | */ | |
f47805a2 | 1425 | err = perf_evsel__apply_filter(evsel, ncpus, nthreads, evsel->filter); |
23d4aad4 ACM |
1426 | if (err) { |
1427 | *err_evsel = evsel; | |
745cefc5 | 1428 | break; |
23d4aad4 | 1429 | } |
0a102479 FW |
1430 | } |
1431 | ||
745cefc5 ACM |
1432 | return err; |
1433 | } | |
1434 | ||
1435 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) | |
1436 | { | |
1437 | struct perf_evsel *evsel; | |
1438 | int err = 0; | |
745cefc5 | 1439 | |
e5cadb93 | 1440 | evlist__for_each_entry(evlist, evsel) { |
fdf14720 WN |
1441 | if (evsel->attr.type != PERF_TYPE_TRACEPOINT) |
1442 | continue; | |
1443 | ||
94ad89bc | 1444 | err = perf_evsel__set_filter(evsel, filter); |
745cefc5 ACM |
1445 | if (err) |
1446 | break; | |
1447 | } | |
1448 | ||
1449 | return err; | |
0a102479 | 1450 | } |
74429964 | 1451 | |
be199ada | 1452 | int perf_evlist__set_filter_pids(struct perf_evlist *evlist, size_t npids, pid_t *pids) |
cfd70a26 ACM |
1453 | { |
1454 | char *filter; | |
be199ada ACM |
1455 | int ret = -1; |
1456 | size_t i; | |
cfd70a26 | 1457 | |
be199ada ACM |
1458 | for (i = 0; i < npids; ++i) { |
1459 | if (i == 0) { | |
1460 | if (asprintf(&filter, "common_pid != %d", pids[i]) < 0) | |
1461 | return -1; | |
1462 | } else { | |
1463 | char *tmp; | |
1464 | ||
1465 | if (asprintf(&tmp, "%s && common_pid != %d", filter, pids[i]) < 0) | |
1466 | goto out_free; | |
1467 | ||
1468 | free(filter); | |
1469 | filter = tmp; | |
1470 | } | |
1471 | } | |
cfd70a26 ACM |
1472 | |
1473 | ret = perf_evlist__set_filter(evlist, filter); | |
be199ada | 1474 | out_free: |
cfd70a26 ACM |
1475 | free(filter); |
1476 | return ret; | |
1477 | } | |
1478 | ||
be199ada ACM |
1479 | int perf_evlist__set_filter_pid(struct perf_evlist *evlist, pid_t pid) |
1480 | { | |
1481 | return perf_evlist__set_filter_pids(evlist, 1, &pid); | |
1482 | } | |
1483 | ||
0c21f736 | 1484 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
74429964 | 1485 | { |
75562573 | 1486 | struct perf_evsel *pos; |
c2a70653 | 1487 | |
75562573 AH |
1488 | if (evlist->nr_entries == 1) |
1489 | return true; | |
1490 | ||
1491 | if (evlist->id_pos < 0 || evlist->is_pos < 0) | |
1492 | return false; | |
1493 | ||
e5cadb93 | 1494 | evlist__for_each_entry(evlist, pos) { |
75562573 AH |
1495 | if (pos->id_pos != evlist->id_pos || |
1496 | pos->is_pos != evlist->is_pos) | |
c2a70653 | 1497 | return false; |
74429964 FW |
1498 | } |
1499 | ||
c2a70653 | 1500 | return true; |
74429964 FW |
1501 | } |
1502 | ||
75562573 | 1503 | u64 __perf_evlist__combined_sample_type(struct perf_evlist *evlist) |
c2a70653 | 1504 | { |
75562573 AH |
1505 | struct perf_evsel *evsel; |
1506 | ||
1507 | if (evlist->combined_sample_type) | |
1508 | return evlist->combined_sample_type; | |
1509 | ||
e5cadb93 | 1510 | evlist__for_each_entry(evlist, evsel) |
75562573 AH |
1511 | evlist->combined_sample_type |= evsel->attr.sample_type; |
1512 | ||
1513 | return evlist->combined_sample_type; | |
1514 | } | |
1515 | ||
1516 | u64 perf_evlist__combined_sample_type(struct perf_evlist *evlist) | |
1517 | { | |
1518 | evlist->combined_sample_type = 0; | |
1519 | return __perf_evlist__combined_sample_type(evlist); | |
c2a70653 ACM |
1520 | } |
1521 | ||
98df858e AK |
1522 | u64 perf_evlist__combined_branch_type(struct perf_evlist *evlist) |
1523 | { | |
1524 | struct perf_evsel *evsel; | |
1525 | u64 branch_type = 0; | |
1526 | ||
e5cadb93 | 1527 | evlist__for_each_entry(evlist, evsel) |
98df858e AK |
1528 | branch_type |= evsel->attr.branch_sample_type; |
1529 | return branch_type; | |
1530 | } | |
1531 | ||
9ede473c JO |
1532 | bool perf_evlist__valid_read_format(struct perf_evlist *evlist) |
1533 | { | |
1534 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; | |
1535 | u64 read_format = first->attr.read_format; | |
1536 | u64 sample_type = first->attr.sample_type; | |
1537 | ||
e5cadb93 | 1538 | evlist__for_each_entry(evlist, pos) { |
9ede473c JO |
1539 | if (read_format != pos->attr.read_format) |
1540 | return false; | |
1541 | } | |
1542 | ||
1543 | /* PERF_SAMPLE_READ imples PERF_FORMAT_ID. */ | |
1544 | if ((sample_type & PERF_SAMPLE_READ) && | |
1545 | !(read_format & PERF_FORMAT_ID)) { | |
1546 | return false; | |
1547 | } | |
1548 | ||
1549 | return true; | |
1550 | } | |
1551 | ||
1552 | u64 perf_evlist__read_format(struct perf_evlist *evlist) | |
1553 | { | |
1554 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1555 | return first->attr.read_format; | |
1556 | } | |
1557 | ||
0c21f736 | 1558 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
81e36bff | 1559 | { |
0c21f736 | 1560 | struct perf_evsel *first = perf_evlist__first(evlist); |
81e36bff ACM |
1561 | struct perf_sample *data; |
1562 | u64 sample_type; | |
1563 | u16 size = 0; | |
1564 | ||
81e36bff ACM |
1565 | if (!first->attr.sample_id_all) |
1566 | goto out; | |
1567 | ||
1568 | sample_type = first->attr.sample_type; | |
1569 | ||
1570 | if (sample_type & PERF_SAMPLE_TID) | |
1571 | size += sizeof(data->tid) * 2; | |
1572 | ||
1573 | if (sample_type & PERF_SAMPLE_TIME) | |
1574 | size += sizeof(data->time); | |
1575 | ||
1576 | if (sample_type & PERF_SAMPLE_ID) | |
1577 | size += sizeof(data->id); | |
1578 | ||
1579 | if (sample_type & PERF_SAMPLE_STREAM_ID) | |
1580 | size += sizeof(data->stream_id); | |
1581 | ||
1582 | if (sample_type & PERF_SAMPLE_CPU) | |
1583 | size += sizeof(data->cpu) * 2; | |
75562573 AH |
1584 | |
1585 | if (sample_type & PERF_SAMPLE_IDENTIFIER) | |
1586 | size += sizeof(data->id); | |
81e36bff ACM |
1587 | out: |
1588 | return size; | |
1589 | } | |
1590 | ||
0c21f736 | 1591 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
74429964 | 1592 | { |
0c21f736 | 1593 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
c2a70653 | 1594 | |
e5cadb93 | 1595 | evlist__for_each_entry_continue(evlist, pos) { |
c2a70653 ACM |
1596 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
1597 | return false; | |
74429964 FW |
1598 | } |
1599 | ||
c2a70653 ACM |
1600 | return true; |
1601 | } | |
1602 | ||
0c21f736 | 1603 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
c2a70653 | 1604 | { |
0c21f736 | 1605 | struct perf_evsel *first = perf_evlist__first(evlist); |
c2a70653 | 1606 | return first->attr.sample_id_all; |
74429964 | 1607 | } |
81cce8de ACM |
1608 | |
1609 | void perf_evlist__set_selected(struct perf_evlist *evlist, | |
1610 | struct perf_evsel *evsel) | |
1611 | { | |
1612 | evlist->selected = evsel; | |
1613 | } | |
727ab04e | 1614 | |
a74b4b66 NK |
1615 | void perf_evlist__close(struct perf_evlist *evlist) |
1616 | { | |
1617 | struct perf_evsel *evsel; | |
1618 | int ncpus = cpu_map__nr(evlist->cpus); | |
1619 | int nthreads = thread_map__nr(evlist->threads); | |
8ad9219e | 1620 | int n; |
a74b4b66 | 1621 | |
e5cadb93 | 1622 | evlist__for_each_entry_reverse(evlist, evsel) { |
8ad9219e SE |
1623 | n = evsel->cpus ? evsel->cpus->nr : ncpus; |
1624 | perf_evsel__close(evsel, n, nthreads); | |
1625 | } | |
a74b4b66 NK |
1626 | } |
1627 | ||
4112eb18 ACM |
1628 | static int perf_evlist__create_syswide_maps(struct perf_evlist *evlist) |
1629 | { | |
8c0498b6 AH |
1630 | struct cpu_map *cpus; |
1631 | struct thread_map *threads; | |
4112eb18 ACM |
1632 | int err = -ENOMEM; |
1633 | ||
1634 | /* | |
1635 | * Try reading /sys/devices/system/cpu/online to get | |
1636 | * an all cpus map. | |
1637 | * | |
1638 | * FIXME: -ENOMEM is the best we can do here, the cpu_map | |
1639 | * code needs an overhaul to properly forward the | |
1640 | * error, and we may not want to do that fallback to a | |
1641 | * default cpu identity map :-\ | |
1642 | */ | |
8c0498b6 AH |
1643 | cpus = cpu_map__new(NULL); |
1644 | if (!cpus) | |
4112eb18 ACM |
1645 | goto out; |
1646 | ||
8c0498b6 AH |
1647 | threads = thread_map__new_dummy(); |
1648 | if (!threads) | |
1649 | goto out_put; | |
4112eb18 | 1650 | |
8c0498b6 | 1651 | perf_evlist__set_maps(evlist, cpus, threads); |
4112eb18 ACM |
1652 | out: |
1653 | return err; | |
8c0498b6 AH |
1654 | out_put: |
1655 | cpu_map__put(cpus); | |
4112eb18 ACM |
1656 | goto out; |
1657 | } | |
1658 | ||
6a4bb04c | 1659 | int perf_evlist__open(struct perf_evlist *evlist) |
727ab04e | 1660 | { |
6a4bb04c | 1661 | struct perf_evsel *evsel; |
a74b4b66 | 1662 | int err; |
727ab04e | 1663 | |
4112eb18 ACM |
1664 | /* |
1665 | * Default: one fd per CPU, all threads, aka systemwide | |
1666 | * as sys_perf_event_open(cpu = -1, thread = -1) is EINVAL | |
1667 | */ | |
1668 | if (evlist->threads == NULL && evlist->cpus == NULL) { | |
1669 | err = perf_evlist__create_syswide_maps(evlist); | |
1670 | if (err < 0) | |
1671 | goto out_err; | |
1672 | } | |
1673 | ||
733cd2fe AH |
1674 | perf_evlist__update_id_pos(evlist); |
1675 | ||
e5cadb93 | 1676 | evlist__for_each_entry(evlist, evsel) { |
23df7f79 | 1677 | err = perf_evsel__open(evsel, evsel->cpus, evsel->threads); |
727ab04e ACM |
1678 | if (err < 0) |
1679 | goto out_err; | |
1680 | } | |
1681 | ||
1682 | return 0; | |
1683 | out_err: | |
a74b4b66 | 1684 | perf_evlist__close(evlist); |
41c21a68 | 1685 | errno = -err; |
727ab04e ACM |
1686 | return err; |
1687 | } | |
35b9d88e | 1688 | |
602ad878 | 1689 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, struct target *target, |
55e162ea | 1690 | const char *argv[], bool pipe_output, |
735f7e0b | 1691 | void (*exec_error)(int signo, siginfo_t *info, void *ucontext)) |
35b9d88e ACM |
1692 | { |
1693 | int child_ready_pipe[2], go_pipe[2]; | |
1694 | char bf; | |
1695 | ||
1696 | if (pipe(child_ready_pipe) < 0) { | |
1697 | perror("failed to create 'ready' pipe"); | |
1698 | return -1; | |
1699 | } | |
1700 | ||
1701 | if (pipe(go_pipe) < 0) { | |
1702 | perror("failed to create 'go' pipe"); | |
1703 | goto out_close_ready_pipe; | |
1704 | } | |
1705 | ||
1706 | evlist->workload.pid = fork(); | |
1707 | if (evlist->workload.pid < 0) { | |
1708 | perror("failed to fork"); | |
1709 | goto out_close_pipes; | |
1710 | } | |
1711 | ||
1712 | if (!evlist->workload.pid) { | |
5f1c4225 ACM |
1713 | int ret; |
1714 | ||
119fa3c9 | 1715 | if (pipe_output) |
35b9d88e ACM |
1716 | dup2(2, 1); |
1717 | ||
0817df08 DA |
1718 | signal(SIGTERM, SIG_DFL); |
1719 | ||
35b9d88e ACM |
1720 | close(child_ready_pipe[0]); |
1721 | close(go_pipe[1]); | |
1722 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
1723 | ||
35b9d88e ACM |
1724 | /* |
1725 | * Tell the parent we're ready to go | |
1726 | */ | |
1727 | close(child_ready_pipe[1]); | |
1728 | ||
1729 | /* | |
1730 | * Wait until the parent tells us to go. | |
1731 | */ | |
5f1c4225 ACM |
1732 | ret = read(go_pipe[0], &bf, 1); |
1733 | /* | |
1734 | * The parent will ask for the execvp() to be performed by | |
1735 | * writing exactly one byte, in workload.cork_fd, usually via | |
1736 | * perf_evlist__start_workload(). | |
1737 | * | |
20f86fc1 | 1738 | * For cancelling the workload without actually running it, |
5f1c4225 ACM |
1739 | * the parent will just close workload.cork_fd, without writing |
1740 | * anything, i.e. read will return zero and we just exit() | |
1741 | * here. | |
1742 | */ | |
1743 | if (ret != 1) { | |
1744 | if (ret == -1) | |
1745 | perror("unable to read pipe"); | |
1746 | exit(ret); | |
1747 | } | |
35b9d88e ACM |
1748 | |
1749 | execvp(argv[0], (char **)argv); | |
1750 | ||
735f7e0b | 1751 | if (exec_error) { |
f33cbe72 ACM |
1752 | union sigval val; |
1753 | ||
1754 | val.sival_int = errno; | |
1755 | if (sigqueue(getppid(), SIGUSR1, val)) | |
1756 | perror(argv[0]); | |
1757 | } else | |
1758 | perror(argv[0]); | |
35b9d88e ACM |
1759 | exit(-1); |
1760 | } | |
1761 | ||
735f7e0b ACM |
1762 | if (exec_error) { |
1763 | struct sigaction act = { | |
1764 | .sa_flags = SA_SIGINFO, | |
1765 | .sa_sigaction = exec_error, | |
1766 | }; | |
1767 | sigaction(SIGUSR1, &act, NULL); | |
1768 | } | |
1769 | ||
1aaf63b1 ACM |
1770 | if (target__none(target)) { |
1771 | if (evlist->threads == NULL) { | |
1772 | fprintf(stderr, "FATAL: evlist->threads need to be set at this point (%s:%d).\n", | |
1773 | __func__, __LINE__); | |
1774 | goto out_close_pipes; | |
1775 | } | |
e13798c7 | 1776 | thread_map__set_pid(evlist->threads, 0, evlist->workload.pid); |
1aaf63b1 | 1777 | } |
35b9d88e ACM |
1778 | |
1779 | close(child_ready_pipe[1]); | |
1780 | close(go_pipe[0]); | |
1781 | /* | |
1782 | * wait for child to settle | |
1783 | */ | |
1784 | if (read(child_ready_pipe[0], &bf, 1) == -1) { | |
1785 | perror("unable to read pipe"); | |
1786 | goto out_close_pipes; | |
1787 | } | |
1788 | ||
bcf3145f | 1789 | fcntl(go_pipe[1], F_SETFD, FD_CLOEXEC); |
35b9d88e ACM |
1790 | evlist->workload.cork_fd = go_pipe[1]; |
1791 | close(child_ready_pipe[0]); | |
1792 | return 0; | |
1793 | ||
1794 | out_close_pipes: | |
1795 | close(go_pipe[0]); | |
1796 | close(go_pipe[1]); | |
1797 | out_close_ready_pipe: | |
1798 | close(child_ready_pipe[0]); | |
1799 | close(child_ready_pipe[1]); | |
1800 | return -1; | |
1801 | } | |
1802 | ||
1803 | int perf_evlist__start_workload(struct perf_evlist *evlist) | |
1804 | { | |
1805 | if (evlist->workload.cork_fd > 0) { | |
b3824404 | 1806 | char bf = 0; |
bcf3145f | 1807 | int ret; |
35b9d88e ACM |
1808 | /* |
1809 | * Remove the cork, let it rip! | |
1810 | */ | |
bcf3145f NK |
1811 | ret = write(evlist->workload.cork_fd, &bf, 1); |
1812 | if (ret < 0) | |
1813 | perror("enable to write to pipe"); | |
1814 | ||
1815 | close(evlist->workload.cork_fd); | |
1816 | return ret; | |
35b9d88e ACM |
1817 | } |
1818 | ||
1819 | return 0; | |
1820 | } | |
cb0b29e0 | 1821 | |
a3f698fe | 1822 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
0807d2d8 | 1823 | struct perf_sample *sample) |
cb0b29e0 | 1824 | { |
75562573 AH |
1825 | struct perf_evsel *evsel = perf_evlist__event2evsel(evlist, event); |
1826 | ||
1827 | if (!evsel) | |
1828 | return -EFAULT; | |
0807d2d8 | 1829 | return perf_evsel__parse_sample(evsel, event, sample); |
cb0b29e0 | 1830 | } |
78f067b3 ACM |
1831 | |
1832 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) | |
1833 | { | |
1834 | struct perf_evsel *evsel; | |
1835 | size_t printed = 0; | |
1836 | ||
e5cadb93 | 1837 | evlist__for_each_entry(evlist, evsel) { |
78f067b3 ACM |
1838 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
1839 | perf_evsel__name(evsel)); | |
1840 | } | |
1841 | ||
b2222139 | 1842 | return printed + fprintf(fp, "\n"); |
78f067b3 | 1843 | } |
6ef068cb | 1844 | |
d9aade7f | 1845 | int perf_evlist__strerror_open(struct perf_evlist *evlist, |
a8f23d8f ACM |
1846 | int err, char *buf, size_t size) |
1847 | { | |
1848 | int printed, value; | |
c8b5f2c9 | 1849 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
a8f23d8f ACM |
1850 | |
1851 | switch (err) { | |
1852 | case EACCES: | |
1853 | case EPERM: | |
1854 | printed = scnprintf(buf, size, | |
1855 | "Error:\t%s.\n" | |
1856 | "Hint:\tCheck /proc/sys/kernel/perf_event_paranoid setting.", emsg); | |
1857 | ||
1a47245d | 1858 | value = perf_event_paranoid(); |
a8f23d8f ACM |
1859 | |
1860 | printed += scnprintf(buf + printed, size - printed, "\nHint:\t"); | |
1861 | ||
1862 | if (value >= 2) { | |
1863 | printed += scnprintf(buf + printed, size - printed, | |
1864 | "For your workloads it needs to be <= 1\nHint:\t"); | |
1865 | } | |
1866 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 | 1867 | "For system wide tracing it needs to be set to -1.\n"); |
a8f23d8f ACM |
1868 | |
1869 | printed += scnprintf(buf + printed, size - printed, | |
5229e366 ACM |
1870 | "Hint:\tTry: 'sudo sh -c \"echo -1 > /proc/sys/kernel/perf_event_paranoid\"'\n" |
1871 | "Hint:\tThe current value is %d.", value); | |
a8f23d8f | 1872 | break; |
d9aade7f ACM |
1873 | case EINVAL: { |
1874 | struct perf_evsel *first = perf_evlist__first(evlist); | |
1875 | int max_freq; | |
1876 | ||
1877 | if (sysctl__read_int("kernel/perf_event_max_sample_rate", &max_freq) < 0) | |
1878 | goto out_default; | |
1879 | ||
1880 | if (first->attr.sample_freq < (u64)max_freq) | |
1881 | goto out_default; | |
1882 | ||
1883 | printed = scnprintf(buf, size, | |
1884 | "Error:\t%s.\n" | |
1885 | "Hint:\tCheck /proc/sys/kernel/perf_event_max_sample_rate.\n" | |
1886 | "Hint:\tThe current value is %d and %" PRIu64 " is being requested.", | |
1887 | emsg, max_freq, first->attr.sample_freq); | |
1888 | break; | |
1889 | } | |
a8f23d8f | 1890 | default: |
d9aade7f | 1891 | out_default: |
a8f23d8f ACM |
1892 | scnprintf(buf, size, "%s", emsg); |
1893 | break; | |
1894 | } | |
1895 | ||
1896 | return 0; | |
1897 | } | |
a025e4f0 | 1898 | |
956fa571 ACM |
1899 | int perf_evlist__strerror_mmap(struct perf_evlist *evlist, int err, char *buf, size_t size) |
1900 | { | |
c8b5f2c9 | 1901 | char sbuf[STRERR_BUFSIZE], *emsg = str_error_r(err, sbuf, sizeof(sbuf)); |
e965bea1 | 1902 | int pages_attempted = evlist->mmap_len / 1024, pages_max_per_user, printed = 0; |
956fa571 ACM |
1903 | |
1904 | switch (err) { | |
1905 | case EPERM: | |
e5d4a290 | 1906 | sysctl__read_int("kernel/perf_event_mlock_kb", &pages_max_per_user); |
e965bea1 ACM |
1907 | printed += scnprintf(buf + printed, size - printed, |
1908 | "Error:\t%s.\n" | |
956fa571 | 1909 | "Hint:\tCheck /proc/sys/kernel/perf_event_mlock_kb (%d kB) setting.\n" |
e965bea1 | 1910 | "Hint:\tTried using %zd kB.\n", |
e5d4a290 | 1911 | emsg, pages_max_per_user, pages_attempted); |
e965bea1 ACM |
1912 | |
1913 | if (pages_attempted >= pages_max_per_user) { | |
1914 | printed += scnprintf(buf + printed, size - printed, | |
1915 | "Hint:\tTry 'sudo sh -c \"echo %d > /proc/sys/kernel/perf_event_mlock_kb\"', or\n", | |
1916 | pages_max_per_user + pages_attempted); | |
1917 | } | |
1918 | ||
1919 | printed += scnprintf(buf + printed, size - printed, | |
1920 | "Hint:\tTry using a smaller -m/--mmap-pages value."); | |
956fa571 ACM |
1921 | break; |
1922 | default: | |
1923 | scnprintf(buf, size, "%s", emsg); | |
1924 | break; | |
1925 | } | |
1926 | ||
1927 | return 0; | |
1928 | } | |
1929 | ||
a025e4f0 AH |
1930 | void perf_evlist__to_front(struct perf_evlist *evlist, |
1931 | struct perf_evsel *move_evsel) | |
1932 | { | |
1933 | struct perf_evsel *evsel, *n; | |
1934 | LIST_HEAD(move); | |
1935 | ||
1936 | if (move_evsel == perf_evlist__first(evlist)) | |
1937 | return; | |
1938 | ||
e5cadb93 | 1939 | evlist__for_each_entry_safe(evlist, n, evsel) { |
a025e4f0 AH |
1940 | if (evsel->leader == move_evsel->leader) |
1941 | list_move_tail(&evsel->node, &move); | |
1942 | } | |
1943 | ||
1944 | list_splice(&move, &evlist->entries); | |
1945 | } | |
60b0896c AH |
1946 | |
1947 | void perf_evlist__set_tracking_event(struct perf_evlist *evlist, | |
1948 | struct perf_evsel *tracking_evsel) | |
1949 | { | |
1950 | struct perf_evsel *evsel; | |
1951 | ||
1952 | if (tracking_evsel->tracking) | |
1953 | return; | |
1954 | ||
e5cadb93 | 1955 | evlist__for_each_entry(evlist, evsel) { |
60b0896c AH |
1956 | if (evsel != tracking_evsel) |
1957 | evsel->tracking = false; | |
1958 | } | |
1959 | ||
1960 | tracking_evsel->tracking = true; | |
1961 | } | |
7630b3e2 WN |
1962 | |
1963 | struct perf_evsel * | |
1964 | perf_evlist__find_evsel_by_str(struct perf_evlist *evlist, | |
1965 | const char *str) | |
1966 | { | |
1967 | struct perf_evsel *evsel; | |
1968 | ||
e5cadb93 | 1969 | evlist__for_each_entry(evlist, evsel) { |
7630b3e2 WN |
1970 | if (!evsel->name) |
1971 | continue; | |
1972 | if (strcmp(str, evsel->name) == 0) | |
1973 | return evsel; | |
1974 | } | |
1975 | ||
1976 | return NULL; | |
1977 | } |